org.objectweb.carol.cmi
Class DistributorSfsbHome

java.lang.Object
  org.objectweb.carol.cmi.Distributor
      org.objectweb.carol.cmi.DistributorSfsbHome

public abstract class DistributorSfsbHome
extends Distributor

Specific Distributor class for the SFSB replication protocol - Handles a backup stub list being a subset of the ServerStubList - Creates the link between the Remote and the Home objects at the create time - Default LB algorithm : RR with local preference

Author:

Benoit Pelletier, Alberto Paz-Jimenez (apaz@no-spam@fi.upm.es), Francisco Perez-Sorrosal (fpsorrosal@no-spam@fi.upm.es)

Constructor Summary

DistributorSfsbHome()

Method Summary

StubData	choose(java.lang.reflect.Method method, java.lang.Object[] parameters) Choose a stub according a rr algorithm with a local preference Default algorithm, can be overriden in a vm
boolean	equivAtBind() To be overriden
boolean	equivAtExport() To be overriden
protected java.util.Set	getBackupStubs() Get the current HA view
Decision	onException(java.lang.reflect.Method method, java.lang.Object[] parameters, StubData sd, java.lang.Exception ex) Decison on Exception The application deployer can override this method to make its own choices.
Decision	onReturn(java.lang.reflect.Method method, java.lang.Object[] parameters, StubData sd, java.lang.Object retVal) Decision on return The application deployer can override this method to make its own choices.

Methods inherited from class org.objectweb.carol.cmi.Distributor

chooseLocalFirst, getCurrentState, getMyServerId, getStubList, preInvoke, read, removeStub, removeStub, toContentsString, toString, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DistributorSfsbHome

public DistributorSfsbHome()

Method Detail

getBackupStubs

protected java.util.Set getBackupStubs()

Get the current HA view

Returns:

set of stubs

equivAtBind

public boolean equivAtBind()

Description copied from class: Distributor

To be overriden

Specified by:

equivAtBind in class Distributor

Returns:

true if the bound object have to be clustered

See Also:

Distributor.equivAtBind()

equivAtExport

public boolean equivAtExport()

Description copied from class: Distributor

To be overriden

Specified by:

equivAtExport in class Distributor

Returns:

true if the export object have to be clustered

See Also:

Distributor.equivAtExport()

choose

public StubData choose(java.lang.reflect.Method method,
                       java.lang.Object[] parameters)
                throws NoServerException

Choose a stub according a rr algorithm with a local preference Default algorithm, can be overriden in a vm

Overrides:

choose in class Distributor

Parameters:

method - called method

parameters - array of parameters passed in

Returns:

chosen stub

Throws:

NoServerException - if no stub available

onException

public Decision onException(java.lang.reflect.Method method,
                            java.lang.Object[] parameters,
                            StubData sd,
                            java.lang.Exception ex)

Decison on Exception The application deployer can override this method to make its own choices.

Overrides:

onException in class Distributor

Parameters:

method - calling method

parameters - parameters of the calling method

sd - stub data

ex - exception

Returns:

decision

onReturn

public Decision onReturn(java.lang.reflect.Method method,
                         java.lang.Object[] parameters,
                         StubData sd,
                         java.lang.Object retVal)

Decision on return The application deployer can override this method to make its own choices.

Overrides:

onReturn in class Distributor

Parameters:

method - calling method

parameters - parameters of the calling method

sd - stub data

retVal - return value

Returns:

decision